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/*
* undelete.c --- routines to try to help a user recover a deleted file.
*
* Copyright (C) 1994 Theodore Ts'o. This file may be redistributed
* under the terms of the GNU Public License.
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <time.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include "debugfs.h"
struct deleted_info {
ext2_ino_t ino;
unsigned short mode;
unsigned short uid;
__u64 size;
time_t dtime;
int num_blocks;
int free_blocks;
};
struct lsdel_struct {
ext2_ino_t inode;
int num_blocks;
int free_blocks;
int bad_blocks;
};
static int deleted_info_compare(const void *a, const void *b)
{
const struct deleted_info *arg1, *arg2;
arg1 = (const struct deleted_info *) a;
arg2 = (const struct deleted_info *) b;
return arg1->dtime - arg2->dtime;
}
static int lsdel_proc(ext2_filsys fs,
blk_t *block_nr,
int blockcnt,
void *private)
{
struct lsdel_struct *lsd = (struct lsdel_struct *) private;
lsd->num_blocks++;
if (*block_nr < fs->super->s_first_data_block ||
*block_nr >= fs->super->s_blocks_count) {
lsd->bad_blocks++;
return BLOCK_ABORT;
}
if (!ext2fs_test_block_bitmap(fs->block_map,*block_nr))
lsd->free_blocks++;
return 0;
}
void do_lsdel(int argc, char **argv)
{
struct lsdel_struct lsd;
struct deleted_info *delarray;
int num_delarray, max_delarray;
ext2_inode_scan scan = 0;
ext2_ino_t ino;
struct ext2_inode inode;
errcode_t retval;
char *block_buf;
int i;
if (argc > 1) {
com_err(argv[0], 0, "Usage: ls_deleted_inodes\n");
return;
}
if (check_fs_open(argv[0]))
return;
max_delarray = 100;
num_delarray = 0;
delarray = malloc(max_delarray * sizeof(struct deleted_info));
if (!delarray) {
com_err("ls_deleted_inodes", ENOMEM,
"while allocating deleted information storage");
exit(1);
}
block_buf = malloc(current_fs->blocksize * 3);
if (!block_buf) {
com_err("ls_deleted_inodes", ENOMEM, "while allocating block buffer");
goto error_out;
}
retval = ext2fs_open_inode_scan(current_fs, 0, &scan);
if (retval) {
com_err("ls_deleted_inodes", retval,
"while opening inode scan");
goto error_out;
}
do {
retval = ext2fs_get_next_inode(scan, &ino, &inode);
} while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
if (retval) {
com_err("ls_deleted_inodes", retval,
"while starting inode scan");
goto error_out;
}
while (ino) {
if (inode.i_dtime == 0)
goto next;
lsd.inode = ino;
lsd.num_blocks = 0;
lsd.free_blocks = 0;
lsd.bad_blocks = 0;
retval = ext2fs_block_iterate(current_fs, ino, 0, block_buf,
lsdel_proc, &lsd);
if (retval) {
com_err("ls_deleted_inodes", retval,
"while calling ext2_block_iterate");
goto next;
}
if (lsd.free_blocks && !lsd.bad_blocks) {
if (num_delarray >= max_delarray) {
max_delarray += 50;
delarray = realloc(delarray,
max_delarray * sizeof(struct deleted_info));
if (!delarray) {
com_err("ls_deleted_inodes",
ENOMEM,
"while reallocating array");
exit(1);
}
}
delarray[num_delarray].ino = ino;
delarray[num_delarray].mode = inode.i_mode;
delarray[num_delarray].uid = inode.i_uid;
delarray[num_delarray].size = inode.i_size;
if (!LINUX_S_ISDIR(inode.i_mode))
delarray[num_delarray].size |=
((__u64) inode.i_size_high << 32);
delarray[num_delarray].dtime = inode.i_dtime;
delarray[num_delarray].num_blocks = lsd.num_blocks;
delarray[num_delarray].free_blocks = lsd.free_blocks;
num_delarray++;
}
next:
do {
retval = ext2fs_get_next_inode(scan, &ino, &inode);
} while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
if (retval) {
com_err("ls_deleted_inodes", retval,
"while doing inode scan");
goto error_out;
}
}
printf("%d deleted inodes found.\n", num_delarray);
printf(" Inode Owner Mode Size Blocks Time deleted\n");
qsort(delarray, num_delarray, sizeof(struct deleted_info),
deleted_info_compare);
for (i = 0; i < num_delarray; i++) {
printf("%6u %6d %6o %6llu %4d/%4d %s", delarray[i].ino,
delarray[i].uid, delarray[i].mode, delarray[i].size,
delarray[i].free_blocks, delarray[i].num_blocks,
time_to_string(delarray[i].dtime));
}
error_out:
free(block_buf);
free(delarray);
if (scan)
ext2fs_close_inode_scan(scan);
return;
}
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